ADA4691-2ACPZ-RL

Overview

The ADA4691-2ACPZ-RL is a dual-channel, low-power operational amplifier featuring rail-to-rail output and ultralow power-down capabilities. It operates on single supplies from 2.7 V to 5 V or dual supplies of ±1.35 V to ±2.5 V. Key electrical specifications include a gain-bandwidth product of 3.6 MHz, a typical supply current of 180 μA per amplifier, and an input bias current as low as 0.5 pA. The device offers a voltage noise density of 16 nV/√Hz and a maximum offset voltage drift of 4 μV/°C over the extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Features independent shutdown pins for each channel to minimize supply current during inactive periods.
• Provides rail-to-rail output swing compatible with low-voltage single-supply systems.
• Delivers very low input bias currents suitable for high-impedance sensor interfaces.

Applications

• Photodiode amplifiers
• Portable audio devices such as MP3 players and smartphones
• ADC drivers

Procurement Notes

Verify the specific package variant against the datasheet ordering guide, as the ADA4691-2 family includes multiple footprint options like LFCSP and WLCSP. Confirm that the 'RL' suffix corresponds to the required reel packaging format for your assembly line. Ensure the component meets RoHS compliance requirements for your target market before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring both low power consumption and high input impedance. The availability of dedicated shutdown controls makes it suitable for battery-operated portable electronics where standby current reduction is critical. Verify that the 3.6 MHz bandwidth aligns with the signal frequency requirements of the application.

Part Context

This part belongs to the ADA4691/ADA4692 family of precision amplifiers manufactured by Analog Devices. The series distinguishes between models with shutdown functionality (ADA469x) and those without (ADA4692). The dual-channel configuration provides two independent amplifiers within a compact surface-mount package, optimizing board space for dense electronic designs.

Replacement Considerations

The ADA4692-2 serves as a functional substitute lacking the shutdown feature. Other family members include the quad ADA4691-4 and the non-shutdown ADA4692-4. Verify pin compatibility and thermal characteristics when transitioning between different package types within the same series.